Question 1

Quaking aspen can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Accepted Answer

A)   9
B)   10
C)   19
D)   38E) B) and C)
F) A) and C)

Question 2

For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

Accepted Answer

A)   23
B)   46
C)   about 1000
D)   about 8 million
E)   about 70 trillionF) None of the above
G) A) and E)

Question 3

Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must ________.

Accepted Answer

A)   persist throughout the cell cycle
B)   be removed before meiosis can begin
C)   be removed before sister chromatids can separate
D)   reattach to chromosomes during G1
E)   be intact for nuclear envelope re-formationF) C) and E)
G) B) and D)

Question 4

After telophase I of meiosis, the chromosomal makeup of each daughter cell is ________.

Accepted Answer

A)   diploid, and the chromosomes are each composed of a single chromatid
B)   diploid, and the chromosomes are each composed of two chromatids
C)   haploid, and the chromosomes are each composed of a single chromatid
D)   haploid, and the chromosomes are each composed of two chromatids
E)   tetraploid, and the chromosomes are each composed of two chromatidsF) D) and E)
G) A) and B)

Question 5

The somatic cells of a privet shrub each contain 46 chromosomes. How do privet chromosomes differ from the chromosomes of humans, who also have 46?

Accepted Answer

A)   Privet cells cannot reproduce sexually.
B)   Privet sex cells have chromosomes that can synapse with human chromosomes in the laboratory.
C)   Genes of privet chromosomes are significantly different from those in humans.
D)   Privet shrubs must be metabolically more like animals than like other shrubs.
E)   Genes on a particular privet chromosome, such as the X, must be on a different human chromosome, such as number 18.F) A) and E)
G) A) and B)

Question 6

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

Accepted Answer

A)   length and position of the centromere only
B)   length, centromere position, and staining pattern only
C)   length, centromere position, staining pattern, and traits coded for by their genes
D)   They have nothing in common except that they are X-shaped.E) None of the above
F) A) and B) C

Question 7

The egg of a fruit fly has 4 individual chromosomes. How many chromosomes are in a somatic cell of a fruit fly?

Accepted Answer

A)   4
B)   2
C)   8
D)   16E) B) and C)
F) None of the above

Question 8

When we first see chiasmata under a microscope, we know that ________.

Accepted Answer

A)   asexual reproduction has occurred
B)   meiosis II has occurred
C)   anaphase II has occurred
D)   prophase I is occurring
E)   separation of homologs has occurredF) A) and B)
G) None of the above

Question 9

A triploid individual ________.

Accepted Answer

A)   is unable to undergo normal meiosis
B)   is unable to undergo mitosis
C)   produces offspring with an even number of chromosome sets (for example, tetraploid, hexaploid) 
D)   has an additional stage in meiosis (meiosis I, meiosis II, and meiosis III) E) B) and D)
F) B) and C) A

Question 10

Refer to the information and associated figure to answer the following question(s) .
-If a female of this species has one chromosome 12 with a blue gene and another chromosome 12 with an orange gene, and has both number 19 chromosomes with short genes, she will produce which of the following egg types?

Accepted Answer

A)   only blue short gene eggs
B)   only orange short gene eggs
C)   one-half blue short and one-half orange short gene eggs
D)   three-fourths blue long and one-fourth orange short gene eggs
E)   three-fourths blue short and one-fourth orange short gene eggsF) All of the above
G) C) and D)

Question 11

Homologous pairs of chromosomes align opposite to each other at the equator of a cell during ________.

Accepted Answer

A)   metaphase of mitosis
B)   metaphase I of meiosis
C)   telophase II of meiosis
D)   metaphase II of meiosisE) B) and C)
F) None of the above

Question 12

A triploid cell contains sets of 3 homologous chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?

Accepted Answer

A)   63 chromosomes in  pairs
B)   63 chromosomes in 21 sets of 3
C)   63 chromosomes, each with 3 chromatids
D)   21 chromosome pairs and 21 unique chromosomesE) A) and C)
F) None of the above

Question 13

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Accepted Answer

A)   backtracking through her previous experiments to obtain another plant with the same traits
B)   breeding this plant with another plant with much weaker traits
C)   cloning the plant
D)   forcing the plant to self-pollinate to obtain an identical one
E)   adding nitrogen to the soil of the offspring of this plant so the desired traits continueF) All of the above
G) A) and C)

Question 14

Hexaploid wheat was produced synthetically by He and co-workers. They mated the diploid species, A. tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

Accepted Answer

A)   Each parent contributed equally to the genome of the offspring.
B)   Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication, and T. turgidum contributed two chromosomes.
C)   Aegilops tauschii contributed two sets of chromosomes, and T. turgidum contributed four sets of chromosomes.
D)   The hexaploid number appeared following mitosis with no subsequent cell division.E) A) and C)
F) A) and B)

Question 15

What makes sexually reproduced offspring genetically different from their parents?

Accepted Answer

A)   genetic recombination during meiosis
B)   genetic recombination during mitosis
C)   crossing over during mitosis
D)   Sexual reproduction does not produce genetically different offspring.E) B) and C)
F) A) and B)

Question 16

Which of the following occurs in meiosis but not in mitosis?

Accepted Answer

A)   chromosome replication
B)   synapsis of chromosomes
C)   production of daughter cells
D)   alignment of chromosomes at the equator
E)   condensation of chromosomesF) A) and C)
G) A) and E)

Question 17

Homologous chromosomes ________.

Accepted Answer

A)   are identical
B)   carry information for the same traits
C)   carry the same alleles
D)   align on the metaphase plate in meiosis IIE) A) and D)
F) A) and C)

Question 18

Which of the following would enable you to detect aneuploidy?

Accepted Answer

A)   autosomy
B)   karyotyping
C)   syngamy
D)   synapsisE) All of the above
F) None of the above B

Question 19

How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8 (2n = 8) ?

Accepted Answer

A)   2
B)   4
C)   8
D)   16
E)   32F) A) and D)
G) A) and B)

Question 20

Which is the smallest unit containing the entire human genome?

Accepted Answer

A)   one male somatic cell
B)   one human chromosome
C)   all of the DNA in all of the cells of one human
D)   all of the DNA in all of the cells of the entire human population
E)   one human gameteF) A) and C)
G) A) and D)

Exam 13: Meiosis

Quaking aspen can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Correct Answer
verified

For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

Correct Answer
verified

Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must ________.

Correct Answer
verified

After telophase I of meiosis, the chromosomal makeup of each daughter cell is ________.

Correct Answer
verified

The somatic cells of a privet shrub each contain 46 chromosomes. How do privet chromosomes differ from the chromosomes of humans, who also have 46?

Correct Answer
verified

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

Correct Answer
verified
C

The egg of a fruit fly has 4 individual chromosomes. How many chromosomes are in a somatic cell of a fruit fly?

Correct Answer
verified

When we first see chiasmata under a microscope, we know that ________.

Correct Answer
verified

A triploid individual ________.

Correct Answer
verified
A

Correct Answer
verified

Homologous pairs of chromosomes align opposite to each other at the equator of a cell during ________.

Correct Answer
verified

A triploid cell contains sets of 3 homologous chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?

Correct Answer
verified

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Correct Answer
verified

Hexaploid wheat was produced synthetically by He and co-workers. They mated the diploid species, A. tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

Correct Answer
verified

What makes sexually reproduced offspring genetically different from their parents?

Correct Answer
verified

Which of the following occurs in meiosis but not in mitosis?

Correct Answer
verified

Homologous chromosomes ________.

Correct Answer
verified

Which of the following would enable you to detect aneuploidy?

Correct Answer
verified
B

How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8 (2n = 8) ?

Correct Answer
verified

Which is the smallest unit containing the entire human genome?

Correct Answer
verified

Exam 13: Meiosis

Quaking aspen can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Correct AnswerverifiedShow Answer

For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

Correct AnswerverifiedShow Answer

Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must ________.

Correct AnswerverifiedShow Answer

After telophase I of meiosis, the chromosomal makeup of each daughter cell is ________.

Correct AnswerverifiedShow Answer

The somatic cells of a privet shrub each contain 46 chromosomes. How do privet chromosomes differ from the chromosomes of humans, who also have 46?

Correct AnswerverifiedShow Answer

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

Correct AnswerverifiedC

The egg of a fruit fly has 4 individual chromosomes. How many chromosomes are in a somatic cell of a fruit fly?

Correct AnswerverifiedShow Answer

When we first see chiasmata under a microscope, we know that ________.

Correct AnswerverifiedShow Answer

A triploid individual ________.

Correct AnswerverifiedA

Correct AnswerverifiedShow Answer

Homologous pairs of chromosomes align opposite to each other at the equator of a cell during ________.

Correct AnswerverifiedShow Answer

A triploid cell contains sets of 3 homologous chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?

Correct AnswerverifiedShow Answer

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Correct AnswerverifiedShow Answer

Hexaploid wheat was produced synthetically by He and co-workers. They mated the diploid species, A. tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

Correct AnswerverifiedShow Answer

What makes sexually reproduced offspring genetically different from their parents?

Correct AnswerverifiedShow Answer

Which of the following occurs in meiosis but not in mitosis?

Correct AnswerverifiedShow Answer

Homologous chromosomes ________.

Correct AnswerverifiedShow Answer

Which of the following would enable you to detect aneuploidy?

Correct AnswerverifiedB

How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8 (2n = 8) ?

Correct AnswerverifiedShow Answer

Which is the smallest unit containing the entire human genome?

Correct AnswerverifiedShow Answer

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C

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A

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B

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